The Home Secretary made the statement after videos of the attack in New Zealand were shared widely online.

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Home Secretary Sajid Javid has told social media companies “enough is enough” after footage of the terrorist attack in Christchurch spread rapidly across the networks and around the world.

Reacting to a tweet from YouTube claiming the video-sharing service was working to remove the footage, he said: “You really need to do more @YouTube @Google @facebook @Twitter to stop violent extremism being promoted on your platforms. Take some ownership. Enough is enough”

Brenton Tarrant livestreamed the murder of 49 people in two mosques in Christchurch, New Zealand, on Friday morning after posting links to a manifesto and images of the weapons on Twitter.

Labour’s shadow digital secretary Tom Watson‏ said Google’s response was “not good enough” after YouTube “reviewed” a copy of the video before removing it from the site.

Damian Collins, the Tory chairman of the Digital, Culture, Media and Sport Select Committee, called for a review into how the footage was shared and “why more effective action wasn’t taken to remove them”.

And Downing Street said social media companies need to act “more quickly” to remove terrorist content.

It's very distressing that the terrorist attack in New Zealand was live streamed on social media & footage was available hours later. There must be a serious review of how these films were shared and why more effective action wasn't taken to remove them.https://t.co/lk9UYWhIp4

Facebook said it “quickly removed” the video, while YouTube said it was “working vigilantly to remove any violent footage”.

Mr Watson‏ hit out at Google for not taking the video down from YouTube immediately.

He said: “Google have contacted me to explain that they posted the ‘inappropriate’ content warning on the NZ massacre footage while they ‘reviewed the video’ for YouTube.

“Not good enough. They should have just taken it down, then reviewed it.”

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Mr Collins added that it was “very distressing” that the attack was live streamed on social media, and that “footage was available hours later”.

“There must be a serious review of how these films were shared and why more effective action wasn’t taken to remove them,” he added.

Police are aware there is extremely distressing footage relating to the incident in Christchurch circulating online. We would strongly urge that the link not be shared. We are working to have any footage removed.

Before the shootings began, an anonymous user on messaging forum 8chan posted links to the manifesto and livestream, promising to “carry out an attack”.

8chan and the similar but unaffiliated site 4chan, where users are anonymous by default, have been the subject of controversy in recent years as some users praised US school shootings and far-right terrorist attacks, as well as sharing conspiracy theories, racist memes and images of child sexual abuse.

Mr Collins said: “These platforms are being used to disseminate the vilest content and make people aware of its existence.

“We should look at companies like that and say for them to allow their platforms to be used in that way is damaging to society. It’s hugely harmful.”

He called for a regulator to have the power to sanction companies allowing the spread of “harmful content”, adding that the “ultimate sanction” would be to bar them from the internet.

Google have contacted me to explain that they posted the "inappropriate" content warning on the NZ massacre footage while they "reviewed the video" for YouTube. Not good enough. They should have just taken it down, then reviewed it. pic.twitter.com/5Zh2IfxwgR